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Ohio Drill & Tool Company is a major manufacturer of Vent Drills.

Vent Drills listed are manufactured and stocked by Ohio Drill & Tool Company for the tire-making industry. Vent Drills are normally Fast Spiral, designed to drill aluminum tire molds. Our Vent Drills are manufactured using top quality M-2 High Speed Steel in many overall lengths and flute combinations per customer requirements.  We also manufacture Vent Drills in regular and parabolic flute for drilling steel molds. 
Fractional Sizes
catalog page: 30
Size Part Number Decimal Equivalent Overall & Flute Length
3/64 434033 .0469 3" X 2"
1/16 434042 .0625 3" X 2"
1/16 434044 .0625 4" X 3"
1/16 434045 .0625 4-1/2" X 3"
1/16 434046 .0625 6" X 4"
1/16 434048 .0625 8" X 4"
3/32 434062 .0938 4-1/2" X 3"
3/32 434064 .0938 6" X 4"
3/32 434068 .0938 8" X 4"
3/32 434069 .0938 8" X 6"
Metric Sizes
catalog page: 30
Size Part Number Decimal Equivalent Overall & Flute Length
.55 S504021J .0217 38mm X 19mm
.70 S504027B .0276 70mm X 35mm
.80 S504031C .0315 75mm X 50mm
.80 S504031G .0315 50mm X 25mm
1.00 S504039W .0394 75mm X 50mm
1.20 S504047X .0472 75mm X 50mm
1.60 S504062V .0630 100mm X 75mm
1.60 S504062W .0630 150mm X 100mm
1.60 S504062Z .0630 200mm X 100mm
2.00 S504078B .0787 150mm X 100mm
Wire Gauge Sizes
catalog page: 30
Size Part Number Decimal Equivalent Overall & Flute Length
#54 435546 .0550 6" X 4"
#55 435554 .0520 4" X 3"
#55 435556 .0520 6" X 4"
#57 435572 .0430 3" X 2"
#57 435573 .0430 3-1/2" X 2-1/2"
#57 435574 .0430 4" X 3"
#57 435575 .0430 4-1/2" X 3"
#57 435576 .0430 6" X 3"
#60 435603 .0400 3" X 2"
#69 435692 .0292 2" X 1"
#69 435693 .0292 3" X 2"
#70 435702 .0280 2" X 1"
#74 435741 .0225 1" X 5/8"
#74 435742 .0225 2" X 5/8"
#74 435744 .0225 2" X 1"
#74 435746 .0225 3" X 1"
#72 S502872D .0250 2" X 1"
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